期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 160, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2022.107061
关键词
Graphene; Nanocomposites; Flame/fire retardancy; Thermal properties
资金
- National Key Research and Devel- opment Program of China [2020YFA0710303]
- National Natural Science Foundation of China [52002072, U1905215, 52072076]
- Natural Sci- ence Foundation of Fujian Province [2021J01589, 2021T002]
A composite paper composed of PEI-modified GO and HAP nanowires has been developed, showing improved thermal stability and flame retardancy. The composite paper provides continuous fire warning and maintains mechanical strength and high flexibility after fire attacking.
Recently, graphene oxide (GO)-based fire alarm systems have been well developed due to their rapid response to the flame. However, the GO-based fire alarm systems still suffer from low thermal stability and mechanical fragility in the flame, resulting in a short alarm time and unreliable warning. Herein, we have developed a composite paper composed of polyethyleneimine (PEI)-modified GO and hydroxyapatite (HAP) nanowires. The results demonstrate that PEI molecules are powerful to improve thermal stability and flame retardancy of GO and thus increase alarm time, while HAP nanowires with intrinsic nonflammability act as a stable fire-resistant framework to ensure the structural integrity of the composite paper after fire attacking. As a result, the GO/PEI/HAP composite paper shows the continuous fire warning, and particularly, maintains its mechanical strength mostly and high flexibility after fire attacking. This work provides an instructive guideline to design reliable GObased fire alarm systems.
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